#include<stdio.h>
struct node {
    char name[10];
    char xuehao[6];
    int score1,score2,score3;
    int age;
}StuDent;
int g()
{
	int k;
	scanf("%d",&k);
	if(k>100||k<0){
		printf("error!\n");
		return 0;
	}
	else{
		StuDent.score1=k;
		return StuDent.score1;
	}
} 
int main()
{
	printf("%d",g());
	return 0;
}
